FITCHBURG -- Three people were arraigned Monday on charges they lied to investigators about the Jeremiah Oliver case, including Christian Sierra, the brother of Jeremiah's mother's boyfriend.

Investigators believe Christian Sierra, 21, of Fitchburg lied to the grand jury about details related to the case, which may have slowed down or misled the investigation, according to court documents at Fitchburg District Court, where the arraignment was held.

Also arraigned were Ashley Cormier, 24, of Fitchburg and Casey Thibault, 23, of Fitchburg, both of whom are identified as friends of Jeremiah Oliver's mother and her boyfriend. They are each being held on $2,500 cash bail.

Five-year-old Jeremiah Oliver was last seen by relatives Sept. 14. His mother Elsa Oliver, and her boyfriend, Alberto Sierra, are still in police custody and have not said anything about the whereabouts of the boy, who is presumed dead.

Christian Sierra's parents put up his bail, which was set at $2,000 cash or $20,000 collateral, at about 4 p.m. Monday.

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